Response of dry bean white mould [Sclerotinia sclerotiorum (Lib.) de Bary, causal organism] to fungicides (original) (raw)

2014, Canadian Journal of Plant Science

Mahoney, K. J., McCreary, C. M. and Gillard, C. L. 2014. Response of dry bean white mould [ Sclerotinia sclerotiorum (Lib.) de Bary, causal organism] to fungicides. Can. J. Plant Sci. 94: 905–910. White mould [Sclerotinia sclerotiorum (Lib.) de Bary, causal organism] is a serious disease of dry bean (Phaseolus vulgaris L.). Producers frequently rely on preventative fungicides, yet, this represents a significant production cost. Studies were conducted in 2009, 2010, and 2011 to determine fungicide efficacy under conditions optimized for white mould. Disease incidence×severity ratings were used to calculate the area under the disease progress curve (AUDPC). After harvest, a return on investment (ROI) was calculated. AUDPC values were similar across boscalid, fluazinam, fluopyram, and thiophanate-methyl and lower than Bacillus subtilis, CaCl2, and the untreated. Yield was greatest for fluazinam and fluopyram, followed by thiophanate-methyl. Bacillus subtilis and CaCl2 yields were simil...